watchOS 5.0 (build 16R5283q) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-06-05T09:53:15Z. The update package is 592.87 MB. This is a delta (partial) update that requires 4.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4aaad0c3b2b8c06707ee9109645f38b2018d200e.zip.